diff --git a/components/spktoolbar/SpkToolbar/SpkToolbar.pas b/components/spktoolbar/SpkToolbar/SpkToolbar.pas
index f9a489bd4..c2350c758 100644
--- a/components/spktoolbar/SpkToolbar/SpkToolbar.pas
+++ b/components/spktoolbar/SpkToolbar/SpkToolbar.pas
@@ -647,7 +647,7 @@ begin
   //todo: not found in lcl
   //inherited AlignWithMargins:=true;
 
-  if (AOwner is TForm) or (AOwner is TFrame) then
+  if (AOwner is TCustomDesignControl) then   // form or frame
     SpkInitLayoutConsts(96); // This default dpi value is ignored for LCL scaling
 
 //  Height := CalcToolbarHeight;